ENMET MEDAIR 2200 - Manual (Page 16)

M ED A IR 2200 ENMET Corporation
13
5.0 Maintenance
The M ED A IR 2200 requires periodic sensor calibration and replacement. Calibration of toxic gas and oxygen sensor
should be performed immediately following installation, one month after installation and every 3 months thereafter.
HC sensor should be calibrated on a monthly bases. Oxygen and CO sensor have an estimated lifetime of 1 – 3 years.
The CO
2
sensor has an estimated lifetime of 3-5 years. Sensors should be replaced when they will not calibrate or
shortly before the end of their estimated lifetime.
The dew point probe (sensor) can not be field calibrated. Dew point sensors should be replaced every two years.
5.1 Cleaning Instructions
C AUTION : Never spray a cleaning solution on the surfaces of the M ED A IR 2200 devices.
Clean the exterior of the M ED A IR 2200 enclosures with a mild soap solution on a clean, damp cloth. Do not soak the
cloth with solution so that moisture drips onto, or lingers on, external surfaces.
Under no circumstances should organic solvents such as paint thinner be used to clean instrument surfaces.
5.2 Maintenance Menu
5.2.1 Accessing Maintenance Menu
The M ED A IR 2200 maintenance menu is accessed by entering the proper password with the OPTION and SELECT
switches. See Section 5.2.2 Figure 6 for full Maintenance Menu flow chart.
Entrance to the maintenance menu is guarded with a four-digit Password. The factory default setting of the password
is 1270. When a valid numerical password is inserted, the user is allowed to enter the maintenance menu.
To enter the maintenance menu. Press the OPTION switch until “Enter Maint Menu” is displayed then press SELECT
switch for the Enter Password menu. Enter the valid password as described below.
In the " Enter Maint Menu " position
Press the SELECT switch " Enter Password
❚
0 " is displayed. Press SELECT switch once, to move cursor to next
digit, this will be the first digit of the password.
In the
❚
000 position, the underline cursor is under the left digit.
Press the OPTION switch to change the left digit; select the correct digit.
Press the SELECT switch, which locks the digit in place and moves the cursor one digit to the right.
Continue this process until the four-digit password is complete. When a valid password is inserted in this manner, the
display is transferred to the "
Calibration " portion of the menu. If an invalid password is inserted you are returned to
the Enter Maint Menu display.
Example: Password Display (with factory installed password entered) and Flow Chart below.
To Calibration
See Section 5.2.2 Figure 6 for full Maintenance Menu flow chart.
Enter Password
1270
CO
PPM O
2
%
O = Option Switch
S = Select Switch
DEW
POINT
O
S
S
Enter Password
❚
0000
Enter Maint Menu
Changes digit indicated by underscore cursor
Locks underscored digit and moves cursor to next digit
O (6)
Valid
Invalid
!